But up to now there were only four dental zirconia ceramic materials in market with relatively high prices.
但上市销售的牙科氧化锆陶瓷材料仅有四种，且价格比较昂贵。
These disadvantages cannot be overcome by addition of tetragonal zirconia resulting in phase transition toughening, because of the low elastic module of the ceramic artificial bone materials.
由于生物陶瓷材料的弹性模量较小，很难采用添加氧化锆引起的相变增韧来解决上述缺点。
SUN J. Study on fabrication and application fundamentals of zirconia matrix composite ceramic materials for spinning and weaving scissors [d]. Jinan: Shandong University, 2005.
[12]孙静。氧化锆基复合陶瓷纺织剪刀材料的研制及其应用基础研究[D]。济南：山东大学，2005。
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